# Wheel A has radius = 7.27 cm, wheel C of radius rC = 21.6 cm. The angular speed of wheel a increases at 2.82 rad/s2. Find the time needed for wheel C to reach 115 rev/min. can someone go in detail pls

I want to know why we didnt use kinematics for this problem. how do we derive the acceleration formulas for c and t?